Roll for rolling billets for plow-beams



INVENTOP.

B-Yhg ATTORNEY o. P. BUGKINGHAM. ROLL EUR ROL-LING BILLETS FOR PLOW BBAMS. No. 249,742. Patented Nov. 22.1881.

CATHARINUS I. BUCKINGHAM, OF CHICAGO, ILLINOIS.

ROLL FOR ROLLING BILLETS FOR PLOWiBEAlVlS.

SPECIFICATION forming part of Letters Patent No. 249,742, dated November 22, 1881.

Application filed July 23,1881. (No model.)

To all whom it may concern Be it known that I, CATHARINUS P. BUGIL INGHAM, of the city of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Rolls for the Purpose of Rolling the Billets used in the Manufacture of a certaimMetal Plow-Beam described in Letters Patent of the United States No. 158,725, dated January 12, 1875, (issued to Malcolm McDowell, of Ravenswood, Illinois,) of which the following is the specification, refercnce being had to the accompanying drawings.

A section of the plow-beam billet, to the production of which my invention relates, is shown in Figure 2, resembling somewhat the shape of an inverted T, and consisting of the heavy rectangular base b, surmounted by the web c. It is obviously necessary in rolling a bar to this shape by the ordinary rolls to use a flattening-pass that will reduce the part where the web c is to be faster than the part composing the base I). This mode of operation is objectionable, because there is occasioned a heavier draw on the part c tllan on the part b, the effect of which is to cause the bar to bend or curve around in the direction of the heavy part b, rendering it inconvenient to handle, and frequently making it necessary to straighten the bar out before insertion in the next pass.

Wy invention consistsin adapting the grooves or passes in a pair of rolls for the manufacture of said plow-beam billets in such a manner as to rellder the operation more rapid and avoid the above objections.

I attain the objects of my invention by the following method.

In the drawings, A, Figure l, is a bar, somewhat similar in shape to a double-headed rail,

4o and may be rolled to the shape here shown by the ordinary well-known methods of rolling iron or steel. The two edges b b of this bar are of the exact size and shape of the base b of the section shown in Fig. 2, while the middle part is twice as wide as the height of the web c, Fig. 2, and is somewhat-thinnerin the middle, to correspond to the taper in the web c.

Fig. 3 shows a pair of rolls embodying my invention, the parts not necessary to a complete understanding of it being broken away.

E represents the upper and F the lower roll.

The bar A, having been first reduced to the form shown in Fig. ,1, and just described, is heated alld made to pass through the pass H H in the rolls E F. This pass is so constructed that the part included between the dotted lines y y and y y shall be of the shape and size ofthe bar A, Fig. l, except that in the exact center are the cutting-edges x x', whose object is to split the bar into two equal parts, eacll sufficient for a plow-beam. rIhe pass H E is made sonlewhat wider at the sides, so as to allow the parts of the bar to separate easily. After'being split the parts are made to pass in succession through the pass I, which is of the shape and size of the billet B, and whose object is to round and inish smoothly the upper edge of the web c, left rough by the splitting-pass H H, and otherwise give inisll to the billet.

I claim-` The rolls E F, provided with pass H H, cutting-edges m x', for the purpose of splitting the bar into two equal parts, and the pass I, substantially as shown, and for the purposes described.

C. P. BUCKINGHAM. Witnesses:

CALVIN DE WOLF, WM. BUcKlNGHAM. 

